Charles f



C. F. KETTERING.

SYSTEM OF ELECTRICAL CONTROL. APPLlCATIUN FILED mama. 1917.

Patented Sept. 7, 1920.

[5577155555 E z U'EJZZTLi I WWW J W HZZT? 5575.

UNITED STATES CHARLES F. KETTERING, OF DAYTON, OHIO, ASSIGNOR, BY ME NE ASSIGNMENTS, TO

PATENT OFFICE.

DELCO-LIGHT COMPANY, OF DAYTON, OHIO, A CORPORATION OF DELAWARE.

SYSTEM OF ELECTRICAL CONTROL.

To all whom it may concern:

Be it known that I, CHARLES F. Knrrnn- I NG, a citizen of the United States of America, residing at De ton, county of Montgomery, and State 0 Ohio, have invented certain new and useful Improvements in S 'stems of Electrical Control of whic the ollowing is a full, clear, and exact descri tion. 1

his invention relates to improvements in electrical measuring devices and more par ticularly to that type used in connection with a battery charging system.

One of the objects of the present inven tion is to position certain of the operating elements-0f the measuring device, in such a manner that the attendant may readily replace an of these elements if necessary, without ismantling the entire device.

Further objects and advantages will be apparent from the following description, reference being had to the accompanying drawings. wherein one preferred form of one embodiment of the present invention is clearly set forth.

In the drawing:

Figure 1 is a view partly diagrammatic and partly structural, and clearly sets forth the different elements of the system.

Fig.2 is a detail viewof the circuit making and breaking elements included on 'the electrical measuring device. These elements are shown closed in the present figure.

Fig. 3 shows the circuit making and breaking elements held in circuit breaking position.

Referring to the drawing, and more particularly to the Fig. 1, the numeral 20 designates an internal combustion engine connected to the electric machine 21 in a manner clearly shown, described and claimed. in the co-pending application of Charles F. Ketterin and l illiam A. Chryst, Serial No. 58 0?, and October 27, 1915..

A bracket 22 is secured to the electric machine 21, and is adapted to-carry the ignition coil 23 and the controller switch 24.

This controller switch is described in the co-pending application of Charles F. Kettering and illiam A. Chryst, Serial No. 120,098, filed September 14, 1916, and is adapted,'when operated by the attendant to close the circuit between the batter and the eleetric machine 21, whereby the e ectric Speciflcation'of Letters Patent.

Application filed March 3 1917. Serial No. 152.348.

machine will be operated to crank the en gine 20.

As soon as the engine has become selfactuating, it will drive the electric machine 21 as a generator to charge the storage battery 25. The controller 24, as has been deh scribed in the above-mentioned application,

.will be automatically held in circuit making position.

When the engine is self-actuating, the primary. ignition circuit therefor will be conipleted through the following circuit: From the electric machine 21 to the controller 24, to any suitable connection, thence from the contact 26 on the controller '24, through the wires 27 and 28,.to' thecoutact element 29 provided in the measuring device 30, thence throu h the contact 31, wire 32, to the circuit reaker 33, connection 34, primary winding of ignition coil 23, to the opposite side-of the electric machine, via the connection 35. The wire connects the secondary winding of coil 23 with the spark plug 51.

The charging circuit will flow from the terminal 26, of the controller 24., through wire 27, measuring device 30, thence through the wire 37 to the battery 25, and back to the opposite side of the generator 21, via the wire 36.

This circuit, which passes through the measuring device 30, will tend to operate the same to indicate the amount of current flowing into the storage battery 25. This amount ofcurrent is indicated by the hand or indicator element 38. The dial element 39 is provided'on the measuring device 30, said dial having graduations 40 as shown'on the drawing.

As shown and described in the'co-pending application of Charles F.. Kettering and illiarn A. Chryst, Serial No. 58,207, filed October 27, 1915, this measuring device will not onlybe operated when theelectric machine 21'is charging the battery 25, but will also be operated in a reverse direction .when

current is being used from the battery for anyvpurpose. en the engine is driving the generator to charge the battery 25, and said battery has become fully charged, the. measuringindicator hand has reached the position,

shown, it will contact with the projection of the bell-crank lever 41, and tend to push the same in the direction of 1'ot:ttion of 'tl1e 1 indicator. This pushing of the projection 42 will rotate the bell-crank lever abontuthe point 4-3, said lever, after being moved a predetermined distance, will force the contact 29 out bfen'gagement with the contact 31, and thereby break the ignition circuit of the engine, which has been closed through the engagement of these two contacts, thereby tending to stop the operation of the engine and COIISQK uently discontinuing the charging of-the hatteries 25 the electric machine 21. i

The making: and breaking of the contact elements 29'and 31 xvill at times tend to causew pitting orsrcing at this peint,-,whieh may, after a length of'time,'requiie-there placing of either one of those contaet elements. I f'.

' In order' that} these contact elements,- if necessary to be replaced, maybe easily removed and new ones positioned, a portion ofthe dial 39 has been cut away a'long the line 44' (see Fig. 1 to pertn'itthe position ing of the contact carrying insulating block 17 to inserted in this opening.

This, as'c an be clearly seen, will make replacing of'the contacts 29 and 31 easy, as all that is necessary is to remove the glass cover from the dial 39, and by removing the screws 45 and 46, which hold the contact elements 29 and 31 respectively in position, the new contact elements may be readily ad justedi' While the form of mechanism herein shown and described, constitutes a preferred form of embodiment of the invention it is to be understoodtli'at other forms might be ado ted all coming within the scope of the clalms which vfollow.

hat I claim is asfollows: v

1. In a, device of the character described, the combination with a nieter including a dial and a hand; of mechanism mounted adjacent to said dialand having a part proa detachably mounted*unitsecuieid adjacent said dial and having a pair of contacts thereon arranged to be. actuated, by said nic/c'lntnism, said ufnit Being,removttlile witliout disturbing said contactoperfit'irifi Ineclr anism.

3. In a device of the cl'iaractcr described, thecombination with a meter, cludingni dial'of segmental shape; of a mildews unit having a hese of segmental shape and seoured adjacent to said dial and having contacts thereon, said base 'an'd-dia-l, when placed together,'formin "a circular -face for the meter; a hand n dapted to travel over said dial; and means mounted adjacent-so as to project into the-path of trevel'orb the hand, and: to actuate the contacts whenengeged by the hand.- 1 i 4. ln'a device of the "character described, the combination with a meter includingopcrating mechanism and adie of segmental shape; a liand aetnaited by said operating; mechanism end adapted to tiavel qve'r said dial; a. unit having a"bdse- 'ofsegmentul shape and' including 1 remova'blecontact i plmtes mounted adjacentvto isaid disrl, :said base'and diiil,+ wheii'l alaeed 'to'gtherg form ing: a -circular fttcc" or *the metelr ;'-'a lever mounted Between'tlie dial end operating mechanisni' and projecting into tlie patlr o'i' travel of the hahd, and adapted to actnate r the'contacts whenengege'd by 'said hand:

51111 a device of -the character described, the combinationwith meter, including 0pcrating mechanism and a i dial of segmental shape; a hand actuated byi s'aid 'bpernting mechanism and adapted'to trevl over said diam-e removable unit h'aving a besefioi segdi'ienttilShape iii-1d including removable con tact plates arrange-d with thei-r oontacting faces substantially perpendicular tothe dial mounted adjecent tosaid dia'l, said base and died, when placed toge'ther, forming 1's; circular face for the meter; fa. lever mounted between the diajl and 'opeieting mechanism and projecting into'the path of travel of the hand, and adapted to actuate the =co1itacts wheil-en aged'by sttid hand.

6. In ztdevic of 'tlie character described, the comhinatioirwith' meter, including a dial of segmental'shhpe; of a removable unit" having abasei'o f segmental shape and se- 1.15 cured adj'stceflfltoj 'saiid dial and having icon- 'tactsthereon, saidbase and dial when-placed together, formi'n j a! circular fade foii the meter; and mec nis'm' a'ct'uated"by said meter'fofi edntrplling'isaid contects In testimonywher'eofl efiiir my signature in the of two subscribing witnesses. CHARLES F. :IQET'IERINEL Wit e see 1 i rem N. Ernest,

J .1 W. MCDONALD; 

